I've got a DK machine. The small swivel bearing inside the joystick has quite a bit of rust on it, causing the joystick to not spring back to center, and to be hard to move in any direction.
I took it apart, cleaned the joystick shaft, sprayed some WD40 on the bearing, and that brought it back to about 80% of perfect.
Now I'm considering just repalcing the joystick altogether.
Any suggestions? I'd like to keep it as stock as possible, so I'd like to stick with an exact replacement using the existing leaf switches.